Keenan and Fitz for Evans, AJ, or Jordy?

Looking to upgrade my WR2 in an 8 man PPR, I have way more depth than the other teams that have these players. Should I offer Keenan and Fitz or just keep what I have?

Aj and Jordy are far better to have than Keenan or fitz. With that said Keenan is a monster if he stays on the field. Chargers offense will be quite terrible all season